VINTAGE ACUMATH NO. 400 SLIDE RULE WITH CASE NICE CONDITION MADE IN USA

Vintage Slide Rule Acumath No. 400 with Case - Has Ink Spots - View Pics

Vintage Slide Rule Acu Math No.400 With Case, U.S.A.

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Vintage Acu-math Slide Rule - No. 400-With Case - Made in USA

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Acumath No. 400 Slide Rule with Case Made USA Vintage